Battery pack management device

ABSTRACT

A battery pack management device capable of reducing power consumption while transmitting and receiving data between a master BMS and a slave BMS by using a wireless communication method. The battery pack management device according to the present disclosure includes: a master BMS including an external communicator, an internal communicator, and a master controller and a slave BMS including a power supply, a state measurement sensor, a slave wireless communicator, and a slave controller.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application is a Continuation of application Ser. No. 16/342,885filed on Apr. 17, 2019, which is the National Phase under 35 U.S.C. §371 of International Application No. PCT/KR2018/006911, filed on Jun.19, 2018, which claims the benefit under 35 U.S.C. § 119(e) to KoreanPatent Application No. 10-2017-0085997, filed in the Republic of Koreaon Jul. 6, 2017, all of which are hereby expressly incorporated byreference into the present application.

TECHNICAL FIELD

The present disclosure relates to battery management technology, andmore particularly, to technology for managing a vehicle battery packmounted on a vehicle and performing wireless communication between amaster battery management system (BMS) and a slave BMS.

BACKGROUND ART

Batteries are rapidly spreading to mobile devices, such as mobilephones, laptop computers, smart phones, and smart pads, electricvehicles (EVs, HEVs, PHEVs), and energy storage system (ESS). Such abattery may be combined with a battery management system (BMS) thatcontrols overall operation of the battery.

A battery pack, particularly a middle- or large-sized battery pack usedin an vehicle or an ESS, may include a plurality of battery modules. Theplurality of battery modules have a multi-module structure in which thebattery modules are connected in series and/or in parallel, therebyincreasing the capacity and/or the output of the battery pack.

Such a multi-structure battery pack may be implemented in various formsaccording to circuit logic, PCB configuration, or the like. In thiscase, a multi-slave structure is mainly used in a BMS so as to improvethe efficiency of monitoring and control. The multi-slave structure isconfigured such that a plurality of slave BMSs respectively manage aplurality of battery modules constituting the battery pack, and a masterBMS integrally controls the plurality of slave BMSs.

In a related-art battery pack, the data transmission and receptionbetween the master BMS and the slave BMS is mainly performed by a wiredmethod. That is, connectors provided at both ends of a cable arerespectively connected to the master BMS and the slave BMS, and themaster BMS and the slave BMS exchange data with each other through thecable.

However, when the master BMS and the slave BMS communicate with eachother in such a wired manner, there is a problem that a circuit failureoccurs due to a contact failure of the connector, a disconnection of thecable, or the like. In addition, in the case of such a wiredcommunication, a space for installing the connector, the cable, and thelike is required, it is difficult to assemble the battery pack due tothe connector, the cable, and the like, and the costs for manufacturinginsulating elements, connectors, cables, and the like are added.

Recently, in order to solve the problem of the wired communicationmethod, attempts have been made to employ a wireless communicationmethod between a master BMS and a slave BMS of a battery pack. However,there are many problems to be solved when using such a wirelesscommunication method, and thus the wireless communication method betweenthe master BMS and the slave BMS has not been easily employed in thebattery pack.

In particular, one of the problems of the wireless communication methodis a standby power consumption problem. That is, in order to performwireless communication between the master BMS and the slave BMS in thebattery pack, a receiving unit, particularly a receiving unit of theslave BMS that receives a command from the master BMS, must be turnedon. For example, in the slave BMS, an amplifier may be set to be alwaysturned on so as to receive a radio frequency (RF) signal from the masterBMS.

Power is required in order for the wireless receiving unit of the slaveBMS to maintain the turned-on state, for example, in order for theamplifier to maintain the turned on state. Since the slave BMS is mainlysupplied with power from the battery module, the wireless receiving unitof the slave BMS needs to be continuously supplied with power from thebattery module for turn-on. However, in this case, there is a problemthat power of the battery module is unnecessarily consumed. Furthermore,in the case of a vehicle battery pack, if a vehicle is not in operationand power of the battery module is consumed during parking, there mayoccur a problem that the vehicle does not start up or a driving distanceis shortened when the vehicle is required to operate.

DISCLOSURE Technical Problem

The present disclosure is designed to solve the problems of the relatedart, and therefore the present disclosure is directed to providing abattery pack management device capable of reducing power consumptionwhile transmitting and receiving data between a master BMS and a slaveBMS by using a wireless communication method, and a battery packincluding the battery pack management device, and a vehicle includingthe battery pack management device.

These and other objects and advantages of the present disclosure may beunderstood from the following detailed description and will become morefully apparent from the exemplary embodiments of the present disclosure.Also, it will be easily understood that the objects and advantages ofthe present disclosure may be realized by the means shown in theappended claims and combinations thereof.

Technical Solution

In one aspect of the present disclosure, there is provided a batterypack management device including one or more battery modules eachincluding a plurality of secondary batteries, the battery packmanagement device including: a master battery management system (BMS)including an external communicator configured to transmit and receive asignal to and from an external device, an internal communicatorconfigured to transmit and receive a wireless communication signal, anda master controller configured to process data received through theexternal communicator and the internal communicator and at least oneslave BMS including a power supply configured to receive power from thebattery module and transmit the received power, a state measurementsensor configured to measure state information of at least one of avoltage and a temperature of the battery module, a slave wirelesscommunicator configured to transmit and receive the wirelesscommunication signal to and from the master BMS, and a slave controllerconfigured to control an on/off time of the slave wireless communicator.

Here, the slave wireless communicator may be turned on or off at apredetermined period.

In addition, the slave controller may be configured to control theon/off time of the slave wireless communicator according to a parkingtime of a vehicle.

In addition, the slave controller may be configured to increase aturn-off time of the slave wireless communicator as the parking time ofthe vehicle increases.

In addition, the slave controller may be configured to control theon/off time of the slave wireless communicator according to a voltage ofthe battery module that is measured by the state measurement sensor.

In addition, the slave controller may be configured to increase aturn-off time of the slave wireless communicator as the measured voltageof the battery module decreases.

In addition, the slave controller may be configured to control theon/off time of the slave wireless communicator according to atemperature of the battery module that is measured by the statemeasurement sensor.

In addition, the slave controller may be configured to increase aturn-off time of the slave wireless communicator as the measuredtemperature of the battery module decreases.

In addition, the control module may be configured to control the on/offtime of the slave wireless communicator according to a traveling timepattern of a vehicle.

In addition, the slave controller may be configured to set a time zonein which a traveling start frequency of the vehicle is highest, anddecrease a turn-off time of the slave wireless communicator in the settime zone.

In addition, in another aspect of the present disclosure, there is alsoprovided a battery pack including the battery pack management deviceaccording to the present disclosure.

In addition, in another aspect of the present disclosure, there is alsoprovided a vehicle including the battery pack management deviceaccording to the present disclosure.

Advantageous Effects

According to an aspect of the present disclosure, communication isperformed between a master BMS and a slave BMS through a wirelessmethod. Thus, it is possible to solve or reduce a problem of therelated-art wired communication method, for example, a problem such as acircuit failure due to a contact failure of a connector or adisconnection of a cable, a volume increase and structural complexity ofa battery pack, a reduction in assemblability, and an increase in costs.

Furthermore, according to an aspect of the present disclosure, it ispossible to solve or minimize a problem that power is unnecessarilyconsumed to receive a wireless signal.

In particular, according to an embodiment of the present disclosure, itis possible to solve a problem that standby power is excessivelyconsumed since an amplifier is continuously turned on in order for aslave BMS to receive a signal from a master BMS.

Therefore, according to these aspects of the present disclosure, it ispossible to solve a problem that a vehicle does not start up or adriving distance is shortened due to power deficiency of a battery packin a situation in which the battery pack has to be used, particularly ina situation in which a vehicle has to be in operation.

DESCRIPTION OF DRAWINGS

The accompanying drawings illustrate a preferred embodiment of thepresent disclosure and together with the foregoing disclosure, serve toprovide further understanding of the technical features of the presentdisclosure, and thus, the present disclosure is not construed as beinglimited to the drawing.

FIG. 1 is a diagram schematically illustrating a configuration of abattery pack management device according to an embodiment of the presentdisclosure.

FIG. 2 is a block diagram schematically illustrating a functionalconfiguration of a master battery management system (BMS) according toan embodiment of the present disclosure.

FIG. 3 is a block diagram schematically illustrating a functionalconfiguration of a slave BMS according to an embodiment of the presentdisclosure.

FIG. 4 is a diagram schematically illustrating a detailed configurationof a power supply module according to an embodiment of the presentdisclosure.

FIG. 5 is a diagram schematically illustrating a detailed configurationof a state measurement module according to an embodiment of the presentdisclosure.

BEST MODE

Hereinafter, preferred embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings. Priorto the description, it should be understood that the terms used in thespecification and the appended claims should not be construed as limitedto general and dictionary meanings, but interpreted based on themeanings and concepts corresponding to technical aspects of the presentdisclosure on the basis of the principle that the inventor is allowed todefine terms appropriately for the best explanation.

Therefore, the description proposed herein is just a preferable examplefor the purpose of illustrations only, not intended to limit the scopeof the disclosure, so it should be understood that other equivalents andmodifications could be made thereto without departing from the scope ofthe disclosure.

FIG. 1 is a diagram schematically illustrating a configuration of abattery pack management device according to an embodiment of the presentdisclosure.

Referring to FIG. 1 , one or more battery modules 10 may be included ina battery pack P to which a battery pack management device 1000according to the present disclosure is applied. In particular, thebattery pack P may include a plurality of battery modules 10, and eachof the battery modules 10 may be electrically connected in series and/orin parallel. Therefore, the output and/or the capacity of the batterypack P may be increased by the electrical connection of the batterymodules 10.

Each of the battery modules 10 may include a plurality of secondarybatteries. The plurality of secondary batteries included in the batterymodule 10 may be electrically connected to each other, therebyincreasing the output and/or the capacity of the battery module 10.

In addition, the battery pack, to which the battery pack managementdevice 1000 according to the present disclosure is applied, may bemounted on a vehicle. That is, the battery pack including the batterypack management device according to the present disclosure may be avehicle battery pack. The vehicle may be a car that is supplied withdriving power for driving, or is supplied with operating power foroperating electronic components, such as audio, air conditioner, and thelike, by the battery pack. In particular, the vehicle may be a car thatis supplied with driving power from the battery pack, for example, anelectric vehicle such as EV, a hybrid vehicle such as HEV or PHEV, andthe like.

As illustrated in FIG. 1 , the battery pack management device 1000according to the present disclosure may include a master BMS 100 and aslave BMS 200.

The master BMS 100 may be provided in the battery pack P to exchangedata with an external device O of the battery pack P. The externaldevice O of the battery pack P is a device disposed outside the batterypack P, and may be another device mounted on the vehicle, for example, acontroller such as an electronic control unit (ECU).

In addition, the master BMS 100 may execute a function of integrallycontrolling one or more slave BMSs 200 provided in the battery pack P.To this end, the master BMS 100 may transmit and receive necessaryinformation through communication with the respective slave BMSs 200.

In particular, as illustrated in FIG. 1 , the master BMS 100 of thebattery pack management device according to the present disclosure maybe configured to perform wireless communication with the slave BMS 200.

FIG. 2 is a block diagram schematically illustrating a functionalconfiguration of the master BMS 100 according to an embodiment of thepresent disclosure.

Referring to FIG. 2 , the master BMS 100 may include an externalcommunication unit 110, an internal communication unit 120, and acontrol unit 130.

The external communication unit 110 may be configured to transmit andreceive a signal to and from the external device O of the battery pack,such as an ECU of a vehicle. The external communication unit 110 may beconnected to the external device O by wire. For example, the externalcommunication unit 110 may be connected to the external device O byusing a cable in the vehicle. The external communication unit 110 mayreceive a command or information from the external device O through thecable, or may be transmit a command or information to the externaldevice O through the cable. For example, the external communication unit110 may transmit information about a state of a battery pack to theexternal device O.

Since the external communication unit 110 communicates with the externaldevice O by a wired method, the external communication unit 110 may bereferred to as a wired communication unit. The present disclosure is notnecessarily limited to such configurations, and the externalcommunication unit 110 may be connected to the external device O by awireless method.

The internal communication unit 120 may wirelessly transmit and receivea signal to and from a slave BMS 200 provided in the battery pack. Forexample, the internal communication unit 120 may receive informationabout a voltage or a temperature of each battery module 10 from theslave BMS 200 as a wireless signal. To this end, the internalcommunication unit 120 may include a radio frequency integrated circuit(RFIC). In addition, the internal communication unit 120 may include anantenna.

In particular, the master BMS 100 may generally include amicrocontroller unit (MCU), and the RFIC may convert a signal receivedfrom the MCU into a wireless communication signal and transmit thewireless communication signal to the slave BMS 200. In addition, in thiscase, the RFIC may convert a wireless communication signal received fromthe slave BMS 200 into a wired communication signal and transmit thewired communication signal to the MCU.

The master BMS 100 may include a plurality of RFICs. For example, theinternal communication unit 120 may include as many RFICs as the numberof slave BMSs 200 included in the battery pack, and the RFICs may managethe slave BMSs 200, respectively.

The control unit 130 may perform an operation of processing datareceived from the external communication unit 110 and the internalcommunication unit 120.

That is, when the external communication unit 110 receives a command orinformation from the external device O, the received information may betransmitted to the control unit 130, and the control unit 130 mayperform necessary operations based on the received information. Forexample, the control unit 130 may receive a wake-up signal from theexternal device O and switch the master BMS 100 from a sleep mode to awake-up mode.

In addition, when the internal communication unit 120 receives stateinformation of the battery module 10 from the slave BMS 200, the controlunit 130 may perform necessary operations based on the receivedinformation. For example, the control unit 130 may receive voltageinformation or temperature information of each battery module 10 fromthe entire slave BMSs 200, and may control a charging/dischargingoperation of a specific battery module 10 or charging/dischargingoperations of the entire battery pack based on the received information.In particular, the control unit 130 may manage the slave BMS 200 byperforming an appropriate processing operation based on the informationtransmitted and received through the internal communication unit 120.

The control unit 130 may be implemented by a MCU provided in the masterBMS 100, but the present disclosure is not limited thereto. In order toimplement various control logics, the control unit 130 may selectivelyinclude processors, application-specific integrated circuits (ASICs),other chipsets, logic circuits, registers, communication modems, dataprocessors, and the like. In addition, when the control logic isimplemented by software, the control unit 130 may be implemented by aset of program modules. In this case, the program modules may be storedin a memory and may be executed by a processor. The memory may beprovided inside or outside the processor, and may be connected to theprocessor by well-known various methods. In addition, the memorycollectively refers to a device configured to store information withoutregard to a type of a device, and does not refer to a specific memorydevice. One or more of various control logics of the control unit 130may be combined, and the combined control logics may be created in theform of a computer-readable code system and recorded on acomputer-readable recording medium. A type of the recording medium isnot particularly limited as long as the recording medium is accessibleby a processor included in a computer. Examples of the recording mediuminclude at least one selected from the group consisting of a ROM, a RAM,a register, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, andan optical data recording device. In addition, the code system may bemodulated into a carrier signal and included in a communication carrierat a specific time point, and may be distributed, stored, and executedin a computer connected via a network. In addition, functional programs,codes, and code segments for implementing the combined control logicsmay be easily inferred by programmers skilled in the art to which thepresent application pertains.

The master BMS 100 may be supplied with power necessary for driving fromthe outside of the battery pack, instead of the battery pack. To thisend, as illustrated in FIG. 2 , the master BMS 100 may further include apower supply unit 140.

The power supply unit 140 may be supplied with power from the externaldevice O of the battery pack. The power supply unit 140 may supply powerfrom the external device O to various elements of the master BMS 100.For example, the power supply unit 140 may supply necessary power to theexternal communication unit 110, the internal communication unit 120,and the control unit 130 by using the power supplied from the externaldevice O.

In this case, the magnitude of the voltage supplied to each element ofthe master BMS 100 may be different from the magnitude of the voltagesupplied from the external device O. Therefore, the power supply unit140 may convert the magnitude of the voltage supplied from the externaldevice O into a voltage magnitude appropriate to each element of themaster BMS 100. For example, the power supply unit 140 may convert thevoltage supplied from the external device O into 3.3 V and supply thevoltage of 3.3 V to each element.

Meanwhile, as illustrated in FIG. 1 , the battery pack may include arelay 20 on a large current path, that is, a charge/discharge path C.The charge/discharge path C of the battery pack may be blocked by therelay 20. The master BMS 100 may control the relay 20 to turn on and offthe large current path of the battery pack. To this end, as illustratedin FIG. 2 , the master BMS 100 may further include a relay driving unit150.

The relay driving unit 150 may turn on or off the relay 20 provided onthe charge/discharge path C of the battery pack. In this case, the relaydriving unit 150 may receive a command from the control unit 130 withrespect to the on/off operation of the relay 20. That is, when thecontrol unit 130 issues a command of turning off the relay 20, the relaydriving unit 150 may turn off the relay 20 according to the command.

The slave BMS 200 may be provided inside the battery pack. Inparticular, when a plurality of battery modules 10 are included in thebattery pack, a plurality of slave BMSs 200 may also be provided in thebattery pack. In this case, the plurality of slave BMSs 200 may managethe plurality of battery modules 10, respectively.

The slave BMS 200 may be connected to the battery module 10 to controlthe battery module 10. A control function of the slave BMS 200 mayinclude a charging/discharging control of a battery cell included in thebattery module 10, that is, a secondary battery, a smoothing control, aswitching, an electrical characteristic value measurement andmonitoring, an error display, an on/off control, and the like. Inaddition, the slave BMS 200 may execute various electrical andelectronic control functions known at the time of filing of the presentapplication.

FIG. 3 is a block diagram schematically illustrating a functionalconfiguration of the slave BMS 200 according to an embodiment of thepresent disclosure.

Referring to FIG. 3 , the slave BMS 200 may include a power supplymodule 210, a state measurement module 220, a wireless communicationmodule 230, and a control module 240.

The power supply module 210 may be supplied with power from the batterymodule 10. That is, the power supply module 210 may be supplied withpower from the corresponding battery module 10 on which the slave BMS200 is mounted. The power supply module 210 may transmit power suppliedfrom the battery module 10 to each element of the slave BMS 200, forexample, the control module 240 and the wireless communication module230. Therefore, the control module 240 and the wireless communicationmodule 230 may be driven by using the power transmitted from the powersupply module 210.

FIG. 4 is a diagram schematically illustrating a detailed configurationof the power supply module 210 according to an embodiment of the presentdisclosure.

Referring to FIG. 4 , the power supply module 210 may include a powersupply unit 211 and a switching unit 212.

The power supply unit 211 may be supplied with power from the batterymodule 10 and convert the supplied power into an appropriate voltage. Inparticular, since powers supplied from the battery module 10 have alarge magnitude of voltages, the powers may be converted into a voltagemagnitude appropriate to each element of the slave BMS 200, for example,the wireless communication module 230 or the control module 240. Forexample, the power supply unit 211 may output a voltage of 3.3 V withrespect to the power supplied from the battery module 10 and supply thevoltage of 3.3 V to the wireless communication module 230 and thecontrol module 240. As the power supply unit 211, various voltageconverters (e.g., a regulator) known at the time of filing of thepresent application may be used.

The switching unit 212 may be disposed between the power supply unit 211and the control module 240 to turn on and off a path through which powersupplied by the power supply unit 211 is supplied to the control module240. In particular, as illustrated in FIG. 4 , the switching unit 212may be turned on or off in response to an on/off control signal of thewireless communication module 230. For example, when a turn-on signal istransmitted from the wireless communication module 230, the switchingunit 212 may be turned on so that a driving power of 3.3 V is suppliedfrom the power supply unit 211 to the control module 240. Thus, thecontrol module 240 may normally operate. The switching unit 212 may beimplemented by a switching element known at the time of filing of thepresent application, for example, various switches such as a fieldeffect transistor (FET).

The state measurement module 220 may measure state information of thebattery module 10, particularly information about a state including atleast one of a voltage and a temperature of the battery module 10. Thestate measurement module 220 may transmit the measurement result to thecontrol module 240, or may perform an appropriate processing operationbased on the measurement result.

FIG. 5 is a diagram schematically illustrating a detailed configurationof the state measurement module 220 according to an embodiment of thepresent disclosure.

Referring to FIG. 5 , the state measurement module 220 may include avoltage measuring unit 221, an equalizing unit 222, and a temperaturemeasuring unit 223.

The voltage measuring unit 221 may measure a voltage of the batterymodule 10. In particular, the voltage measuring unit 221 may measure anentire voltage of the battery module 10, and may measure a voltageacross both ends of each battery cell provided in the battery module 10,that is, each secondary battery. The voltage measuring unit 221 mayinclude a voltage sensor that measures a voltage across both ends of thebattery cell or the battery module, or a current sensor that measures acurrent flowing through the battery cell or the battery module.

The voltage measuring unit 221 may convert the measured voltage into adigital value. The voltage measuring unit 221 may transmit thedigital-converted voltage value to the control module 240.Alternatively, the voltage measuring unit 221 may store the measuredvoltage in a memory or the like.

When there is a difference in voltages of the respective secondarybatteries provided in the battery module 10, the equalizing unit 222 mayperform an operation of equalizing the voltages of the secondarybatteries. To this end, the equalizing unit 222 may be configured sothat current paths are formed at both ends of each secondary battery andswitching elements are provided on the current paths. The equalizingunit 222 may control the switching elements to decrease or increase thevoltage of each secondary battery. In this manner, the equalizing unit222 may perform voltage balancing of the secondary batteries.

In addition, the equalizing unit 222 may include a resistive element. Inthis case, the equalizing unit 222 may connect a specific secondarybattery to the resistive element so that power of the specific secondarybattery is consumed by the resistive element. Thus, the equalizing unit222 may perform a balancing operation of decreasing the voltage of thesecondary battery. Alternatively, the equalizing unit 222 may supply thepower of the specific secondary battery to another secondary batterythrough the control of the switching unit 212, or may supply the powerto the entire battery module 10 through the control of the switchingunit 212.

The temperature measuring unit 223 may measure a temperature of thebattery module 10. For example, the temperature measuring unit 223 maymeasure an external temperature and/or an internal temperature of thebattery module 10. In addition, the temperature measuring unit 223 maymeasure temperatures of several positions in the battery module 10 so asto grasp the temperature of the battery module 10 at each portion inmore detail. Meanwhile, the temperature measuring unit 223 may transmitthe measured temperature information of the battery module 10 to thecontrol module 240. The temperature measuring unit 223 may include atemperature sensor known at the time of filing of the presentapplication. In addition, the temperature measured by the temperaturemeasuring unit 223 may be stored in a memory or the like.

The wireless communication module 230 may communicate with the masterBMS 100 provided in the battery pack. In particular, the wirelesscommunication module 230 may wirelessly exchange a signal with themaster BMS 100. To this end, the wireless communication module 230 mayinclude an RF system on chip (RFSoC). In this case, the RFSoC may beconnected to the master BMS 100, for example, the RFIC of the master BMS100, through an internal wireless link and perform communicationtherewith.

In addition, the wireless communication module 230 may include anantenna and an amplifier. For example, the wireless communication module230 may receive a signal wirelessly transmitted from the RFIC of themaster BMS 100 through the antenna and the amplifier. In addition, thewireless communication module 230 may transmit information transmittedfrom the control module 240 to the RFIC of the master BMS 100 throughthe antenna and the amplifier.

Meanwhile, the wireless communication module 230 may be supplied withpower necessary for driving from the power supply unit 211 of the powersupply module 210. In addition, the wireless communication module 230may control the on/off operation of the switching unit 212 of the powersupply module 210 so as to turn on and off the power supplied from thepower supply unit 211 to the control module 240.

The control module 240 may receive a variety of information from aplurality of elements provided in the slave BMS 200, process the same,and transmit a necessary command to each element.

For example, the control module 240 may receive voltage stateinformation of the respective secondary batteries from the voltagemeasuring unit 221 of the state measurement module 220 and confirm avoltage difference between the secondary batteries. When the controlmodule 240 determines that a voltage of a predetermined secondarybattery is different from those of other secondary batteries, thecontrol module 240 may transmit a command of performing an equalizingoperation to the equalizing unit 222 of the state measurement module220. The equalizing unit 222 may receive the command of the controlmodule 240 and perform the equalizing operation of the battery module10, that is, the balancing operation.

In another example, the control module 240 may receive temperatureinformation of the battery module 10 from the temperature measuring unit223 of the state measurement module 220 and determine the presence orabsence of an abnormal situation. When the control module 240 determinesthat the temperature is excessively high, the control module 240 maytransmit the information to the master BMS 100 through the wirelesscommunication module 230, so that the master BMS 100 performs anappropriate control operation, for example an operation of turning offthe relay 20.

In addition, the control module 240 may receive a control command forthe battery module 10 from the master BMS 100 through the wirelesscommunication module 230, and perform an appropriate processingoperation according to the control command. For example, the controlmodule 240 may enable the state measurement module 220 to grasp voltageinformation or temperature information of the battery module 10according to the command of the master BMS 100.

The slave BMS 200 may generally include a MCU. The control module 240may be configured to execute the function by the MCU of the slave BMS200, but the present disclosure is not necessarily limited thereto. Thatis, according to the present disclosure, the control module 240 may beimplemented by not the MCU of the related-art slave BMS 200 but a deviceseparately mounted on the slave BMS 200.

In order to implement various control logics, the control module 240 mayselectively include processors, ASICs, other chipsets, logic circuits,registers, communication modems, data processors, and the like. Inaddition, when the control logic is implemented by software, the controlmodule 240 may be implemented by a set of program modules. In this case,the program modules may be stored in a memory and may be executed by aprocessor. The memory may be provided inside or outside the processor,and may be connected to the processor by well-known various methods. Inaddition, the memory collectively refers to a device configured to storeinformation without regard to a type of a device, and does not refer toa specific memory device. One or more of various control logics of thecontrol module 240 may be combined, and the combined control logics maybe created in the form of a computer-readable code system and recordedon a computer-readable recording medium. A type of the recording mediumis not particularly limited as long as the recording medium isaccessible by a processor included in a computer. Examples of therecording medium include at least one selected from the group consistingof a ROM, a RAM, a register, a CD-ROM, a magnetic tape, a hard disk, afloppy disk, and an optical data recording device. In addition, the codesystem may be modulated into a carrier signal and included in acommunication carrier at a specific time point, and may be distributed,stored, and executed in a computer connected via a network. In addition,functional programs, codes, and code segments for implementing thecombined control logics may be easily inferred by programmers skilled inthe art to which the present application pertains.

In particular, in the battery pack management device according to thepresent disclosure, the wireless communication module 230 may repeatedlyperform turn-on and turn-off. That is, the wireless communication module230 may not be always turned on and may be maintained respectively in aturn-on period and a turn-off period, in at least some situations orsome times.

For example, the wireless communication module 230 may be turned onduring a first time period, and may be maintained in a turned-off stateduring a second time period. When the second time period is completed,the wireless communication module 230 may enter the first time periodagain and be turned on.

In such a configuration, the control module 240 may control the on/offtime of the wireless communication module 230. That is, the controlmodule 240 may control the wireless communication module 230 withrespect to when the wireless communication module 230 is turned on oroff, and the like. In addition, the control module 240 may control thewireless communication module 230 with respect to how long the turn-ontime or turn-off time of the wireless communication module 230 has to bemaintained.

According to the configuration of the present disclosure, the wirelesscommunication module 230 is not always turned on and is turned off for apredetermined time, thereby reducing power consumption of the wirelesscommunication module 230. The wireless communication module 230 issupplied with driving power from the power supply module 210. Since thedriving power is supplied from the battery module 10, the powerconsumption of the battery module 10 may be reduced. Therefore, it ispossible to minimize the problem that the vehicle does not start up orthe driving distance of the vehicle is shortened due to the powerconsumption of the battery module 10.

In particular, the wireless communication module 230 may alternatelyrepeat the turned-on state and the turned-off state when the vehicle isin the off-state. For example, when the vehicle is in the on-state, thewireless communication module 230 may continuously maintain theturned-on state. However, when the vehicle is in the off-state, thewireless communication module 230 may alternately repeat the turned-onstate and the turned-off state. According to the configuration of thepresent disclosure, since the wireless communication module 230 isalways turned on when the vehicle is in operation, the signal receptionof the slave BMS 200 may be quickly performed. When the vehicle is inthe off-state, the power consumption for maintaining the turned-on stateof the wireless communication module 230 is reduced, thereby preventingthe battery module 10 from being discharged.

Preferably, the wireless communication module 230 may be turned on oroff at predetermined intervals. That is, the wireless communicationmodule 230 may be periodically turned on and off. For example, thewireless communication module 230 may be turned on or off at every 110ms.

The wireless communication module 230 may maintain the turned-on stateand the turned-off state for a predetermined time. For example, when thewireless communication module 230 is turned on, the wirelesscommunication module 230 may maintain the turned-on state for 10 ms andbe then turned off after the elapse of 10 ms. Then, the wirelesscommunication module 230 may maintain the turned-off state for 100 msand be then turned on again after the elapse of 100 ms from theturning-off. In this case, the wireless communication module 230 maymaintain the turned-on state for 10 ms and maintain the turned-off statefor 100 ms, and the turn-on and turn-off period may be 110 ms.

The turn-on and turn-off period of the wireless communication module 230may be controlled and changed by the control module 240.

In particular, the control module 240 may change the turn-on andturn-off period of the wireless communication module 230 when thevehicle is not in operation. When the vehicle is in operation, that is,when the start-up of the vehicle is turned on, the wirelesscommunication module 230 of the slave BMS 200 is continuously turned on.Thus, it is preferable to quickly exchange data with the master BMS 100.However, when the vehicle is not in operation, that is, when thestart-up of the vehicle is turned off, the wireless communication module230 of the slave BMS 200 is turned off for a predetermined time. Thus,it is possible to reduce unnecessary power consumption due to thestandby of the wireless communication module 230.

Preferably, the control module 240 may control the on/off operation ofthe wireless communication module 230 with respect to a vehicle parkingstate.

In particular, the control module 240 may control the on/off time of thewireless communication module 230 according to a parking time of avehicle. The parking may refer to a state in which the start-up of thevehicle is turned off. That is, the control module 240 may control theon/off time of the wireless communication module 230 according to howmuch the time has elapsed in a state in which the start-up of thevehicle is turned off.

The control module 240 may directly measure the parking time of thevehicle, or the control module 240 may receive information about theparking time from another device outside the battery pack, for example,an ECU. Even when the control module 240 measures the parking time ofthe vehicle, the control module 240 may receive, from the externaldevice O such as the ECU, information indicating that the start-up ofthe vehicle has been turned off, and measure the parking time of thevehicle based on the received information.

The control module 240 may divide the parking time of the vehicle intotwo or more sections and differently set the on/off time of the wirelesscommunication module 230 according to each section. For example, thecontrol module 240 may divide the parking time of the vehicle into asection of less than 24 hours and a section of 24 hours or more anddifferently sets the turn-off duration time of the wirelesscommunication module 230.

More preferably, as the parking time of the vehicle increases, thecontrol module 240 may increase the off time of the wirelesscommunication module 230. That is, when the parking time exceeds apredetermined reference time, the control module 240 may control thewireless communication module 230 to increase the off time of thewireless communication module 230.

For example, when the parking time of the vehicle is less than 24 hours,the control module 240 may set the turn-off duration time of thewireless communication module 230 to 100 ms. In this case, when thewireless communication module 230 is turned off once, the wirelesscommunication module 230 maintains the turned-off state for 100 ms. Onthe other hand, when the parking time of the vehicle is 24 hours ormore, the control module 240 may change the turn-off duration time ofthe wireless communication module 230 to 300 ms. In this case, when thewireless communication module 230 is turned off once, the wirelesscommunication module 230 maintains the turned-off state for 300 ms. Insuch a configuration, as the parking time increases, the turn-off periodlength of the wireless communication module 230 may increase.

According to the configuration of the present disclosure, the turn-offperiod of the wireless communication module 230 may be adaptivelychanged according to the parking time of the vehicle. That is, when theparking time is short, it is unlikely that the secondary battery of thebattery module 10 will be discharged by the standby power, so that theturn-off period can be shortened. In this case, the user of the batterymodule 10, for example, the driver of the vehicle, may feel that thebattery module 10 is quickly woken up. However, as the parking timebecomes longer, it is likely that the battery will be discharged by theaccumulated standby power. If the turn-off period increases as theparking time increases as in the embodiment, the standby power may bereduced. Thus, in this case, even if the driver does not use the vehiclefor a long time due to business trip or travel, it is possible toprevent standby power from being excessively consumed, therebypreventing the discharge of the battery or the like. In addition, thecase where the vehicle is not used for a long time occurs sometimes. Inthis case, even if the wake-up of the battery is somewhat delayed ascompared with the case where the vehicle is frequently used, it islikely that the driver will understand such a situation.

Meanwhile, the case where the turn-off time of the wirelesscommunication module 230 is changed based on one reference time has beendescribed in the above embodiment, but the present disclosure is notnecessarily limited thereto. That is, the control module 240 may changethe turn-off time of the wireless communication module 230 stepwisebased on two or more reference times in association with the parkingtime. In this case, the control module 240 may divide the parking timeinto three or more time intervals and separately set the turn-off timeof the wireless communication module 230.

For example, the control module 240 may set 10 hours as a firstreference time and 20 hours as a second reference time in associationwith the parking time of the vehicle. The control module 240 mayseparately set the turn-off time of the wireless communication module230 to 100 ms as a first off time, 200 ms as a second off time, and 300ms as a third off time. In this case, when the parking time of thevehicle is less than 10 hours (first time interval), the turn-off timeof the wireless communication module 230 may be set to 100 ms. When theparking time of the vehicle is equal to or more than 10 hours and lessthan 20 hours (second time interval), the turn-off time of the wirelesscommunication module 230 may be set to 200 ms. When the parking time ofthe vehicle is 20 hours or more (third time interval), the turn-off timeof the wireless communication module 230 may be set to 300 ms.

In addition, the control module 240 may preferably control the on/offtime of the wireless communication module 230 according to the voltageof the battery module 10.

That is, the state measurement module 220 of the slave BMS 200 maymeasure the voltage of the battery module 10, and the measured voltageinformation may be transmitted to the control module 240 provided in thesame slave BMS 200. The control module 240 may set the turn-on timeand/or the turn-off time of the wireless communication module 230according to the received voltage measurement result of the batterymodule 10.

Furthermore, the control module 240 may control the turn-on time and/orthe turn-off time of the wireless communication module 230 according tothe voltage measurement information of the battery module 10 in a statein which the start-up of the vehicle is turned off. Even when thebattery module 10 is in a sleep mode, the slave BMS 200 may beperiodically woken up. In such a wake-up state, the state measurementmodule 220 may measure the voltage of the battery module 10.

In particular, as the measured voltage of the battery module 10decreases, the control module 240 may increase the off time of thewireless communication module 230. That is, when the voltage of thebattery module 10 is lower than a predetermined reference voltage, thecontrol module 240 may control the wireless communication module 230 toincrease the turn-off time of the wireless communication module 230.

For example, when the measured voltage of the battery module 10 is 20 Vor more, the control module 240 may set the turn-off duration time ofthe wireless communication module 230 to 100 ms. On the other hand, whenthe measured voltage of the battery module 10 is less than 20 V, thecontrol module 240 may increase the turn-off duration time of thewireless communication module 230 to 200 ms.

According to the configuration of the present disclosure, the turn-offperiod of the wireless communication module 230 may be adaptivelychanged according to the voltage of the battery module 10. That is, whenthe voltage of the battery module 10 is a predetermined level or less,the turn-off duration time of the wireless communication module 230 isincreased, thereby reducing the power consumption of the battery module10 due to the wireless communication module 230. In particular, in sucha configuration, it is possible to prevent a problem that the batterymodule 10 is discharged by the wireless communication module 230 andthus the use of the battery pack is impossible.

Furthermore, the control module 240 may divide the voltage of thebattery module 10 into voltage sections of three or more levels anddifferently set the turn-off duration time according to the dividedvoltage sections. That is, the control module 240 may divide theturn-off duration time of the wireless communication module 230 intothree or more levels according to the voltage of the battery module 10.

For example, the control module 240 may set a first reference voltage to20 V and a second reference voltage to 15 V. In this case, the voltagesection of the battery module 10 may be divided into three sections: 20V or more as a first voltage section, 15 V or more and less than 20 V asa second voltage section, and less than 15 V as a third voltage section.In the first voltage section, the control module 240 may maintain theturn-off time of the wireless communication module 230 at 100 ms. Next,in the second voltage section, the control module 240 may maintain theturn-off time of the wireless communication module 230 at 200 ms. In thethird voltage section, the control module 240 may maintain the turn-offtime of the wireless communication module 230 at 300 ms. That is, in thethird voltage section among the entire voltage sections, the controlmodule 240 may relatively maximize the turn-off time of the wirelesscommunication module 230.

According to the configuration of the present disclosure, the turn-offtime of the wireless communication module 230 is more finely adjustedaccording to the voltage of the battery module 10, thereby adaptivelycoping with the wake-up time and standby power consumption problem ofthe battery module 10. In particular, when the voltage of the batterymodule 10 falls near a discharge limit point, the turn-off time of thewireless communication module 230 is maximized, thereby preventing thecell of the battery module 10 from being completely discharged.

In addition, the control module 240 may preferably control the on/offtime of the wireless communication module 230 according to thetemperature of the battery module 10.

That is, the state measurement module 220 of the slave BMS 200 maymeasure the temperature of the battery module 10, and the measuredtemperature information may be transmitted to the control module 240.The control module 240 may set the turn-on time and/or the turn-off timeof the wireless communication module 230 according to the receivedtemperature information of the battery module 10.

In particular, as the measured temperature of the battery module 10decreases, the control module 240 may increase the turn-off time of thewireless communication module 230. That is, when the temperature of thebattery module 10 is lower than a predetermined reference temperature,the control module 240 may control the wireless communication module 230to increase the off time of the wireless communication module 230.

For example, when the measured temperature of the battery module 10 is0° C. or more, the control module 240 may set the turn-off duration timeof the wireless communication module 230 to 100 ms. On the other hand,when the measured temperature of the battery module 10 is less than 0°C., the control module 240 may increase the turn-off duration time ofthe wireless communication module 230 to 200 ms.

According to the configuration of the present disclosure, it is possibleto prevent the battery module 10 from being quickly discharged in astate in which the temperature of the battery module 10 is low. That is,when the temperature of the battery module 10 is low, the performance ofeach secondary battery provided in the battery module 10 cannot beproperly exhibited, and thus the output voltage may be lowered ordischarged more quickly. However, according to the embodiment, thestandby power consumption of the battery module 10 is reduced at a lowtemperature, and thus, it is possible to reduce a problem that thestart-up of the vehicle is not performed or the driving distance isreduced due to the low power of the battery module 10 in a lowtemperature condition such as a winter season.

In addition, even in the embodiment in which the off time of thewireless communication module 230 is changed according to thetemperature of the battery module 10, the turn-off time may be set tothree or more levels. For example, the control module 240 may divide thetemperature of the battery module 10 into temperature sections of threeor more levels and set the turn-off time of the wireless communicationmodule 230 to sections of three or more levels. In this case, the offtime of the wireless communication module 230 may be more finelyadjusted according to the temperature of the battery module 10.

Meanwhile, when the measured temperature of the battery module 10 is areference temperature or more, the control module 240 may decrease theoff time of the wireless communication module 230.

For example, the control module 240 may maintain the turn-off time ofthe wireless communication module 230 at 100 ms in the temperaturesection in which the measured temperature of the battery module 10 is 0°C. to 70° C., and may reduce the turn-off duration time of the wirelesscommunication module 230 from 100 ms to 50 ms when the temperature ofthe battery module 10 is 70° C. or more.

According to the configuration of the present disclosure, the emergencysituation of the battery module 10 can be detected more quickly. Forexample, in the event of heat or fire in the battery module 10 or thevehicle due to abnormality of the battery module 10 or the vehicle, thetemperature of the battery module 10 may increase. In this case, sincethe turn-off time of the wireless communication module 230 is reduced,the slave BMS 200 may perform wake-up, perform functions, and transmitinformation more quickly.

More preferably, the control module 240 may control the on/off time ofthe wireless communication module 230 according to a traveling timepattern of the vehicle. The traveling time pattern of the vehicle may beinformation obtained by patterning the time zone in which the vehicletravels. Furthermore, the traveling time pattern of the vehicle may bepattern information about the time at which the vehicle mainly startstraveling.

In particular, the control module 240 may analyze the traveling timepattern of the vehicle. Furthermore, the control module 240 may set thetime zone (traveling start time zone) in which the traveling startfrequency of the vehicle is highest. For example, the control module 240may receive, from the external device O of the battery pack, informationindicating that the vehicle has started. The control module 240 maystore, in the memory, time information indicating when the vehicle hasstarted traveling, based on the time when the information has beenreceived. The control module 240 may build a database in relation to thetraveling start time of the vehicle. The control module 240 may analyzethe time zone in which the vehicle is most likely to start traveling,and set the same as a time zone (traveling start time zone) in which thetraveling start frequency is highest. In addition, the control module240 may decrease the turn-off time of the wireless communication module230 in the set time zone.

In this case, the control module 240 may divide the time zone based on aday (24 hours). More specifically, the control module 240 may divide thetime of 0 hour to 24 hours into a plurality of time zones, and determinein which one of the plurality of time zones the vehicle mainly starts.The control module 240 may reduce the turn-off time of the wirelesscommunication module 230 at a point in the time zone determined as thetime at which the vehicle most starts, for example, the start point ofthe corresponding time zone.

For example, the control module 240 may divide the time of the day into12 time intervals on the 2-hour basis. When the time point at which thevehicle mainly starts traveling, that is, the time zone in which thevehicle mainly starts, is detected as a time zone between 5 am to 7 am,the control module 240 may reduce the turn-off time of the wirelesscommunication module 230 at the time of entering the time zone, that is,5 am. More specifically, the control module 240 may set the turn-offtime of the wireless communication module 230 to 300 ms until 5 am fromthe time point when the traveling of the vehicle is completed, and setthe turn-off time of the wireless communication module 230 to 100 msfrom 5 am.

According to the configuration of the present disclosure, since theon/off period of the wireless communication module 230 is determinedaccording to the traveling pattern of the vehicle, it is possible toperform the on/off control of the wireless communication module 230optimized for the driving pattern or the living pattern of the driver ofthe vehicle. That is, the standby power consumption of the batterymodule 10 is minimized by increasing the turn-off time of the wirelesscommunication module 230 at the time point at which it is predicted thatthe driver will not normally drive the vehicle. The battery module 10 ofthe vehicle being parked may be quickly woken up by decreasing theturn-off time of the wireless communication module 230 at the time pointwhen it is predicted that the driver will start driving the vehicle.

In addition, even in the configuration in which the turn-off time iscontrolled according to the traveling time pattern of the vehicle, thecontrol module 240 may control the turn-off time by differentiallydividing the turn-off time into three or more levels. For example, thecontrol module 240 may maintain the turn-off time of the wirelesscommunication module 230 at 200 ms until before 3 am, and decrease theturn-off duration time of the wireless communication module 230 to 150ms in the time zone of 4 am to 5 am. Furthermore, the control module 240may further decrease the turn-off duration time of the wirelesscommunication module 230 to 100 ms in the time zone of 5 am to 6 am.

According to the configuration of the present disclosure, the standbypower consumption and quick wake-up of the battery module 10 may be moreefficiently performed considering the traveling start time of thevehicle more precisely.

Meanwhile, in the above configuration, the turn-off time of the wirelesscommunication module 230 may be increased again after a predeterminedtime has elapsed in a state in which the turn-off time of the wirelesscommunication module 230 is decreased considering the traveling timepattern of the vehicle. That is, when the vehicle does not start up evenafter the time zone in which the vehicle most starts, the control module240 may increase the turn-off time of the wireless communication module230 again. For example, when it is determined that the vehicle does notstart up even after the time enters the zone of 5 am to 7 am, thecontrol module 240 may change the turn-off time of the wirelesscommunication module 230 again from 100 ms to 300 ms at the time pointwhen the time zone is completed, that is, the time point of 7 am. Inthis case, after a predetermined has elapsed, the turn-off time of thewireless communication module 230 may return to the original state.According to the above embodiment, the situation in which the vehicledoes not travel every day may be considered.

In addition, in the above configuration, the turn-off time of thewireless communication module 230 may sequentially return to theoriginal state without returning to the original state at a time. Thatis, when the vehicle does not start even after entering the time zone inwhich the vehicle most starts, the control module 240 may primarilyincrease the turn-off time of the wireless communication module 230after a first time has elapsed, and secondarily increase the turn-offtime of the wireless communication module 230 after a second time longerthan the first time has elapsed. For example, the control module 240decreases the turn-off time of the wireless communication module 230from 300 ms to 100 ms at 5 am. However, when it is determined that thevehicle does not start, the control module 240 may increase the turn-offtime of the wireless communication module 230 from 100 ms to 200 ms at 6am. After that, when it is determined that the vehicle does not start,the control module 240 may increase the turn-off time of the wirelesscommunication module 230 from 200 ms to 300 ms at 7 am.

Meanwhile, in the above embodiments, the case where the control module240 increases or decreases the turn-off time of the wirelesscommunication module 230 according to each situation has been described,but the control module 240 may change the turn-on time of the wirelesscommunication module 230 instead of the turn-off time of the wirelesscommunication module 230. For example, the control module 240 mayincrease the turn-on time of the wireless communication module 230 inthe time zone in which the traveling start frequency of the vehicle ishighest. More specifically, when it is analyzed that the traveling ofthe vehicle is mainly performed between 5 am and 6 am, the controlmodule 240 may maintain the turn-on time of the wireless communicationmodule 230 at 10 ms before 5 am, and increase the turn-on time of thewireless communication module 230 to 20 ms from the time point of 5 am.In this case, the turn-off time of the wireless communication module 230is relatively decreased by increasing only the turn-on time of thewireless communication module 230 instead of the turn-off time of thewireless communication module 230.

In addition, the control module 240 may change both the turn-on time andthe turn-off time of the wireless communication module 230 in varioussituations described above. For example, the control module 240 mayincrease the turn-off time of the wireless communication module 230 asthe parking time of the vehicle increases, and decrease the turn-on timeof the wireless communication module 230 accordingly. More specifically,when the parking time of the vehicle exceeds a reference time, thecontrol module 240 may increase the turn-off time of the wirelesscommunication module 230 from 100 ms to 200 ms, and decrease the turn-ontime of the wireless communication module 230 from 10 ms to 5 ms.

Meanwhile, the control module 240 of the slave BMS 200 may configure apacket by adding a cyclic redundancy check (CRC) code to a data framewhen data is transmitted to the master BMS 100. In this case, thecontrol unit 130 of the master BMS 100 checks a data CRC of a packetreceived from the control module 240, so as to verify whether a dataerror occurs in the wireless communication module 230 of the slave BMS200 or the internal communication unit 120 of the master BMS 100.

In addition, the control module 240 may transmit a specific signal tothe wireless communication module 230 of the corresponding slave BMS200. In this case, when no signal is received from the control module240 within a designated time, the wireless communication module 230 maydetermine that an error occurs in the operation of the control module240. The wireless communication module 230 may attempt the normalrecovery of the control module 240 by toggling the switching unit 212 ofthe power supply module 210 to reset the control module 240.

According to the configuration of the present disclosure, in the slaveBMS 200 or the master BMS 100, it is possible to more effectivelydiagnose the state of the control part such as the MCU or thecommunication part such as the RFID, thereby further improving thefunctional stability of the battery pack management device.

The battery pack management device according to the present disclosuremay be applied to a battery pack itself. Therefore, the battery packaccording to the present disclosure may include the battery packmanagement device described above.

In addition, the battery pack management device according to the presentdisclosure may be applied to a vehicle. Therefore, the vehicle accordingto the present disclosure may include the battery pack management devicedescribed above. In this case, the battery pack management device may beprovided inside the battery pack, provided outside the battery pack, orprovided in the vehicle itself. In particular, since the standby powerconsumption of the battery module 10 is reduced when the vehicle doesnot travel, the battery pack management device according to the presentdisclosure may minimize the problem that the vehicle does not start in asituation in which the vehicle must travel, or the driving distance isreduced.

The present disclosure has been described in detail. However, it shouldbe understood that the detailed description and specific examples, whileindicating preferred embodiments of the disclosure, are given by way ofillustration only, since various changes and modifications within thescope of the disclosure will become apparent to those skilled in the artfrom this detailed description.

The term “module” such as “power supply module”, “state measurementmodule”, “wireless communication module”, and “control module” is usedherein, and the term “unit” such as “external communication unit”,“internal communication unit”, and “control unit” is used herein, butthese terms indicate logical configuration units, and it is obvious tothose skilled in the art that these terms do not necessarily indicatethe elements that can be physically separated or need to be physicallyseparated.

What is claimed is:
 1. A battery pack management device including abattery pack having a battery module including a plurality of secondarybatteries and mountable on a vehicle, the battery pack management devicecomprising: a master battery management system (BMS) including anexternal communication unit configured to transmit and receive a signalto and from an external device of the battery pack, an internalcommunication unit configured to transmit and receive a wirelesscommunication signal to and from one or more slave BMSs provided in thebattery pack, and a control unit programmed to process data receivedthrough the external communication unit and the internal communicationunit; and a slave BMS including a power supply module configured toreceive power from the battery module and transmit the received power, astate measurement module configured to measure state information of atleast one of a voltage and a temperature of the battery module, awireless communication module configured to transmit and receive awireless communication signal to and from the master BMS, and a controlmodule configured to control an on/off time of the wirelesscommunication module, wherein the control module is programmed tocontrol the on/off time of the wireless communication module accordingto at least one selected from a parking time of the vehicle, a voltageof the battery module that is measured by the state measurement module,a temperature of the battery module that is measured by the statemeasurement module or a traveling time pattern of the vehicle.
 2. Thebattery pack management device of claim 1, wherein the wirelesscommunication module is turned on or off at predetermined intervals. 3.The battery pack management device of claim 1, wherein the controlmodule is programmed to increase a turn-off time of the wirelesscommunication module as the parking time of the vehicle increases. 4.The battery pack management device of claim 1, wherein the controlmodule is programmed to increase a turn-off time of the wirelesscommunication module as the measured voltage of the battery moduledecreases.
 5. The battery pack management device of claim 1, wherein thecontrol module is programmed to increase a turn-off time of the wirelesscommunication module as the measured temperature of the battery moduledecreases.
 6. The battery pack management device of claim 1, wherein thecontrol module is programmed to set a time zone in which a travelingstart frequency of the vehicle is highest, and decrease a turn-off timeof the wireless communication module in the set time zone.
 7. A batterypack comprising the battery pack management device of claim
 1. 8. Avehicle comprising the battery pack management device of claim
 1. 9. Thebattery pack management device of claim 1, wherein the control module isprogrammed to measure the parking time of the vehicle, or receiveinformation about the parking time from another device outside thebattery pack.
 10. The battery pack management device of claim 9, whereinthe control module is programmed to divide the parking time of thevehicle into at least two sections and differently set the on/off timeof the wireless communication module according to each of the at leasttwo sections.
 11. The battery pack management device of claim 1, whereinthe control module is programmed to control the on/off time of thewireless communication module according to the traveling time pattern ofthe vehicle, and wherein the traveling time pattern of the vehicle isobtained by patterning a time zone in which the vehicle travels.